body {
  margin: 0;
}
h1,
h2,
h3,
h4 {
  color: #00a0e8;
  font-family: "微软雅黑";
  line-height: 1.8;
}
img {
  vertical-align: top;
}
.header {
  border-bottom: 2px solid #00a0e8;
  overflow: hidden;
}
.wrap {
  margin: 0 auto;
  width: 1200px;
}
#logo {
  margin: 10px 0;
  float: left;
  width: 200px;
  border-right: 1px solid #00a0e8;
  font: bold 30px/40px "Arial";
}
.nav {
  float: left;
  margin: 10px 0;
  font: 14px/40px "宋体";
}
.nav a {
  float: left;
  margin: 0 15px;
  color: #00a0e8;
  text-decoration: none;
}
.banner {
  width: 100%;
}
.wrap p {
  font: 14px/30px "宋体";
}
.about_img {
  margin: 20px auto;
  display: block;
  width: 60%;
}
